Command Reference Guide

Data Center Bridging | 455
Usage
Information
If you configure PFC on a 40GbE port, count the 40GbE port as four PFC-enabled ports in the pfc-port
number you enter in the command syntax.
To achieve lossless PFC operation, the PFC port count and queue number used for the reserved buffer
size that is created must be greater than or equal to the buffer size required for PFC-enabled ports and
lossless queues on the switch.
You must reload the stack or a specified stack unit (use the reload command in EXEC Privilege mode)
for the PFC buffer configuration to take effect.
Related
Commands
dcbx port-role
Configure the DCBX port role used by the interface to exchange DCB information.
Syntax
dcbx port-role {config-source | auto-downstream | auto-upstream | manual}
To remove DCBX port role, use the no dcbx port-role {config-source | auto-downstream |
auto-upstream | manual}
command.
Parameters
Defaults
Manual.
Command Modes
INTERFACE PROTOCOL LLDP
Command
History
Usage
Information
DCBX requires that you enable LLDP to advertise DCBX TLVs to peers.
Configure DCBX operation at the INTERFACE level on a switch or globally on the switch. To verify
the DCBX configuration on a port, use the show interface dcbx detail command.
dcbx version
Configure the DCBX version used on the interface.
dcb stack-unit all pfc-buffering pfc-port pfc-queues Configure the PFC buffer for all switches in the stack.
config-source |
auto-downstrea
m |
auto-upstream |
manual
Enter the DCBX port role, where:
•
config-source: configures the port to serve as the configuration source on the
switch.
•
auto-upstream: configures the port to receive a peer configuration. The
configuration source is elected from auto-upstream ports.
•
auto-downstream: configures the port to accept the internally propagated DCB
configuration from a configuration source.
•
manual: configures the port to operate only on administer-configured DCB
parameters. The port does not accept a DCB configuration received form a peer or a
local configuration source.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.16.0 Introduced on MXL 10/40GbE Switch IO Module